A bottom-discharge bucket

Abstract

This invention discloses a bottom-discharge bucket; an inner bucket is disposed within an outer bucket and is circumferentially rotatable relative to the outer bucket. A bottom plate is rotatably connected to the outer bucket, and the rotation of the bottom plate relative to the outer bucket opens or closes the opening at the bottom of the inner bucket. The inner bucket and the bottom plate are connected by a transmission mechanism, and a locking mechanism is disposed in the outer bucket, locking the bottom plate in a closed state. During the rotation of the inner bucket relative to the outer bucket, the inner bucket can drive the bottom plate to rotate via the transmission mechanism, switching the bottom plate between a closed and open state. The rotation of the inner bucket can also trigger the locking mechanism to unlock the bottom plate. This invention, by driving the inner bucket to rotate relative to the outer bucket through a drive mechanism, can achieve the unlocking and automatic closing of the bottom plate. The opening or closing of the bottom plate requires no manual intervention, simplifying operation, saving time and labor, reducing labor costs, and improving the excavation efficiency of pile holes.

Description

Technical Field

[0001] This invention relates to the technical field of building construction facilities, and more specifically to a bottom-discharge bucket. Background Technology

[0002] When constructing highways and railways, manual excavation of pile holes is required. During this process, a pile hole excavation and lifting system is typically used to lift the excavated material, thereby improving excavation efficiency. Patent CN216741607U discloses a prefabricated intelligent control and lifting system for excavated pile holes, specifically a bottom-discharge bucket. When emptying the excavated material from the bucket, the lifting rope, controlled by a wireless remote, rotates the rope pulley shaft, mechanically lifting the L-shaped pin. This causes the control lever to tilt naturally, lowering the bucket's bottom plate and allowing the excavated material to be poured out.

[0003] The objective disadvantages of the existing technology: The bottom-discharge bucket structure described above can automatically unload slag by driving the lifting rope with a motor, but after unloading, it is necessary to manually reset the bottom plate of the bucket and lock it manually. The operation is troublesome, time-consuming and labor-intensive, with low work efficiency, which affects the excavation efficiency of the pile hole. Summary of the Invention

[0004] Therefore, to address the aforementioned shortcomings, this invention provides a bottom-discharge bucket type. By driving the inner bucket to rotate relative to the outer bucket via a drive mechanism, the bottom plate can be unlocked and automatically closed. Opening or closing the bottom plate requires no manual intervention, simplifying operation, saving time and labor, reducing labor costs, and improving the efficiency of pile hole excavation. Furthermore, during the unloading process, the rotating inner bucket reduces the amount of slag remaining on the inner wall of the bucket, resulting in more thorough unloading.

[0005] This invention is implemented as follows: a bottom-discharge bucket is constructed, characterized in that: the bottom-discharge bucket includes an outer bucket body, an inner bucket body, a bottom plate, a transmission mechanism, a locking mechanism, a drive mechanism, and a handle; the inner bucket body is disposed within the outer bucket body and can rotate circumferentially relative to the outer bucket body; the bottom plate is rotatably connected to the outer bucket body, and the rotation of the bottom plate relative to the outer bucket body can open or close the opening at the bottom of the inner bucket body; the inner bucket body and the bottom plate are connected by a transmission mechanism; the locking mechanism is disposed within the outer bucket body, and the locking mechanism locks the bottom plate in a closed state; during the rotation of the inner bucket body relative to the outer bucket body, the inner bucket body can drive the bottom plate to rotate through the transmission mechanism, so that the bottom plate switches between a closed state and an open state; the rotation of the inner bucket body can also trigger the locking mechanism to unlock the bottom plate.

[0006] According to the present invention, a bottom-discharge type bucket is characterized in that: the inner wall surface of the outer bucket is provided with a first annular protrusion and a second annular protrusion, the first annular protrusion and the second annular protrusion are spaced apart along the Y direction, the outer wall surface of the inner bucket is provided with a third annular protrusion, and a collar is screwed to the top of the inner bucket to facilitate the disassembly of the inner bucket. The collar and the third annular protrusion are spaced apart along the Y direction and are located between the first annular protrusion and the second annular protrusion to achieve axial positioning of the inner bucket and the outer bucket.

[0007] According to the present invention, a bottom-discharge bucket is characterized in that: the transmission mechanism includes a connecting rod and a slider, the two ends of the connecting rod are respectively hinged to the slider and the bottom plate, the slider is slidably disposed on the outer bucket body along the Y direction; the outer wall surface of the outer bucket body is provided with a driving ring protrusion, the driving ring protrusion is used for the slider to abut against; the driving ring protrusion is divided into four segments, namely a first arc segment, a first spiral segment, a second arc segment and a second spiral segment connected end to end, along the Y direction, the first arc segment is parallel to the second arc segment, and the first arc segment is lower than the second arc segment.

[0008] According to the present invention, a bottom-discharge bucket is characterized in that: the locking mechanism includes an L-shaped locking pin, a guide rod, a nut, and a first spring; the guide rod passes through the outer bucket body and is connected to the L-shaped locking pin, the L-shaped locking pin being movable in the X direction; the first spring is sleeved on the guide rod, and the nut is screwed onto the guide rod; an mounting plate is provided on the outer bucket body, the mounting plate having an arc-shaped groove, and a limit pin is provided at the end of the bottom plate; when the bottom plate is in the closed state, the limit pin is engaged in the arc-shaped groove, and the L-shaped locking pin, under the action of the first spring, restricts the limit pin within the arc-shaped groove, at which time the bottom plate is locked and cannot be flipped downwards to open.

[0009] According to the present invention, a bottom-discharge type bucket is characterized in that: a limiting groove is provided on the drive ring protrusion, the limiting groove being used for the L-shaped locking pin to be engaged; the limiting groove includes a first arc groove, a second arc groove, and a third arc groove connected in sequence, the first arc groove being disposed on the lower surface of the first spiral segment, the second arc groove being disposed on the lower surface of the first arc segment, and the third arc groove being disposed on the lower surface of the second spiral segment; the first arc groove and the third arc groove are concentrically arranged with the inner bucket body, and the distance from the second arc groove to the center line of the inner bucket body gradually decreases from both ends of the second arc groove to the middle position.

[0010] According to the present invention, a bottom-discharge bucket is characterized in that the driving mechanism includes a motor and a gear, the gear is disposed on the output shaft of the motor, the gear meshes with the toothed structure on the third annular protrusion, and when the motor drives the gear to rotate, the inner bucket body will rotate relative to the outer bucket body.

[0011] According to the present invention, a bottom-discharge type bucket is characterized in that a handle is rotatably disposed on the top of the outer bucket body.

[0012] According to the present invention, a bottom-discharge bucket is characterized in that: the inner bucket body is provided with a floating structure, that is, the inner bucket body can float up and down relative to the outer bucket body, and a second spring is provided between the first annular protrusion and the third annular protrusion.

[0013] According to the present invention, a bottom-discharge type bucket is characterized in that its working method is as follows:

[0014] When loading slag and stone, the bottom plate is in the closed state. At this time, the first arc segment of the drive ring protrusion abuts against the slider, and the L-shaped locking pin restricts the limit pin in the arc groove under the action of the first spring.

[0015] During slag unloading, the motor operates, causing the inner barrel to rotate relative to the outer barrel. Initially, the limiting pin is still locked in the arc groove by the L-shaped locking pin. Even if the drive ring protrusion and the slider are a certain distance apart along the Y direction, the slider will not move upward. As the inner barrel continues to rotate, the top of the L-shaped locking pin will engage with the limiting groove. The L-shaped locking pin will then pass through the first, second, and third arc grooves in sequence, eventually disengaging from the limiting groove. During the passage of the L-shaped locking pin through the second arc groove, the distance from the second arc groove to the center line of the inner barrel gradually decreases from both ends of the second arc groove to the middle position. The L-shaped locking pin will move to the left along the X direction, causing it to unlock the limiting pin. The bottom plate will flip downwards under the gravity of the slag. Driven by the connecting rod, the slider will move upwards along the Y direction and eventually abut against the drive ring protrusion. After the top of the L-shaped locking pin disengages from the limiting groove, it will reset under the action of the first spring. When the second arc segment is directly above the slider, the motor stops working. During this process, the inner barrel rotates 180 degrees relative to the outer barrel, so that the initial first arc segment is above the slider, and the final second arc segment is above the slider.

[0016] When loading slag again, the motor continues to work, and the inner barrel rotates relative to the outer barrel. During the rotation, the first or second spiral segment drives the slider to move downward along the Y direction. Under the action of the connecting rod, the bottom plate will flip upward, causing the limit pin to engage again, resulting in the L-shaped locking pin locking the arc groove. Of course, the right end of the L-shaped locking pin is provided with a guide slope to ensure that the limit pin can smoothly pass over the L-shaped locking pin during the process of engaging the arc groove. During this process, the inner barrel rotates 180 degrees relative to the outer barrel, so that the initial second arc segment is above the slider, and the final first arc segment is above the slider.

[0017] The present invention has the following advantages: The present invention provides a bottom-discharge bucket, which has the following key points;

[0018] Firstly, the inner barrel rotates relative to the outer barrel to unlock the locking mechanism and automatically close the bottom plate;

[0019] Secondly, the specific structure of the drive ring protrusion on the inner barrel body is increased;

[0020] Thirdly, the specific structure of the limiting groove on the drive convex ring is increased;

[0021] Fourthly, the inner barrel can float up and down relative to the outer barrel, and its structure allows it to vibrate up and down upon impact during the opening of the bottom plate. Furthermore, in this invention, the inner barrel is driven to rotate relative to the outer barrel via a drive mechanism, enabling the unlocking and automatic closing of the bottom plate. Opening and closing the bottom plate requires no manual intervention, simplifying operation, saving time and labor, reducing labor costs, and improving the efficiency of pile hole excavation. In addition, during the slag unloading process, the rotating inner barrel reduces the amount of slag residue remaining on its inner wall, resulting in more thorough slag unloading. Attached Figure Description

[0022] Figure 1 This is a schematic diagram showing the state during the loading of slag and stone.

[0023] Figure 2 This is a schematic diagram showing the state during slag unloading;

[0024] Figures 3-4 This is a schematic diagram of the drive ring convexity;

[0025] Figure 5 This is a diagram showing an installation plate installed on the outer barrel.

[0026] Figure 6 The diagram shows a floating structure for the inner barrel. Detailed Implementation

[0027] The following will be combined with the appendix Figures 1-5 This invention will be described in detail, and the technical solutions in the embodiments of this invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0028] The present invention provides a bottom-discharge bucket, as shown in the figure, which can be implemented in the following manner: The bottom-discharge bucket includes an outer bucket body 1, an inner bucket body 2, a bottom plate 3, a transmission mechanism 4, a locking mechanism 5, a drive mechanism 6, and a handle 7.

[0029] The inner barrel 2 is disposed inside the outer barrel 1, and the inner barrel 2 can rotate circumferentially relative to the outer barrel 1. The inner wall surface of the outer barrel 1 is provided with a first annular protrusion 12 and a second annular protrusion 13, which are spaced apart along the Y direction. The outer wall surface of the inner barrel 2 is provided with a third annular protrusion 22. A collar 23 is screwed to the top of the inner barrel 2 to facilitate the disassembly of the inner barrel. The collar 23 and the third annular protrusion 22 are spaced apart along the Y direction and located between the first annular protrusion 12 and the second annular protrusion 13 to achieve axial positioning of the inner barrel 2 and the outer barrel 1.

[0030] The bottom plate 3 is rotatably connected to the outer tub 1. Rotating the bottom plate 3 relative to the outer tub 1 can open or close the opening at the bottom of the inner tub 2. The inner tub 2 and the bottom plate 3 are connected by a transmission mechanism 4. A locking mechanism 5 is located on the outer tub 1. The locking mechanism locks the bottom plate 3 in the closed state. During the rotation of the inner tub 2 relative to the outer tub 1, the inner tub 2 can drive the bottom plate 3 to rotate through the transmission mechanism 4, allowing the bottom plate 3 to switch between the closed and open states. The rotation of the inner tub 2 can also trigger the locking mechanism 5 to unlock the bottom plate 3.

[0031] The transmission mechanism 4 includes a connecting rod 41 and a slider 42. The two ends of the connecting rod 41 are hinged to the slider 42 and the base plate 3, respectively. The slider 42 is slidably mounted on the outer barrel 1 along the Y direction. A drive ring protrusion 21 is provided on the outer wall surface of the outer barrel 1, which is used for the slider to abut against. Figure 3 and Figure 4 The drive ring protrusion 21 is divided into four segments, namely the first arc segment 211, the first spiral segment 212, the second arc segment 213, and the second spiral segment 214 connected end to end. Along the Y direction, the first arc segment 211 is parallel to the second arc segment 213, and the first arc segment 211 is lower than the second arc segment 213.

[0032] The locking mechanism 5 includes an L-shaped locking pin 51, a guide rod 52, a nut 53, and a first spring 54. The guide rod 52 passes through the outer barrel 1 and is connected to the L-shaped locking pin 51. The L-shaped locking pin 51 can move in the X direction. The first spring 54 is sleeved on the guide rod 52, and the nut 53 is screwed onto the guide rod 53. Figure 5 As shown, an installation plate 11 is provided on the outer barrel 1, and the installation plate 11 is provided with an arc-shaped groove 111. A limit pin 31 is provided at the end of the bottom plate 3. When the bottom plate 3 is in the closed state, the limit pin 31 is engaged in the arc-shaped groove 111, and the L-shaped locking pin 51, under the action of the first spring 54, restricts the limit pin 31 within the arc-shaped groove 111. At this time, the bottom plate 3 is locked and cannot be flipped down to open.

[0033] like Figure 1 and Figure 4As shown, a limiting groove 215 is provided on the drive ring protrusion 21, which is used for the L-shaped locking pin 51 to be engaged. The limiting groove 215 includes a first arc groove 2151, a second arc groove 2152, and a third arc groove 2153 connected in sequence. The first arc groove 2151 is located on the lower surface of the first spiral segment 212, the second arc groove 2152 is located on the lower surface of the first arc segment 211, and the third arc groove 2153 is located on the lower surface of the second spiral segment 214. The first arc groove 2151 and the third arc groove 2153 are concentrically arranged with the inner cylinder 2, and the distance from the second arc groove 2152 to the center line of the inner cylinder 2 gradually decreases from both ends of the second arc groove 2152 to the middle position.

[0034] The drive mechanism 6 includes a motor 61 and a gear 62. The gear 62 is mounted on the output shaft of the motor 61 and meshes with the toothed structure on the third annular protrusion 22. When the motor 61 drives the gear 62 to rotate, the inner barrel 2 will rotate relative to the outer barrel 1.

[0035] The handle 7 is rotatably mounted on the top of the outer barrel 1.

[0036] The working principle is as follows:

[0037] When loading slag and stone, if Figure 1 As shown, the base plate 3 is in the closed state. At this time, the first arc segment 211 of the drive ring protrusion 21 abuts against the slider 42, and the L-shaped locking pin 51 restricts the limiting pin 31 in the arc groove 111 under the action of the first spring 54.

[0038] When unloading slag, if Figure 2As shown, when the motor 61 is working, the inner barrel 2 rotates relative to the outer barrel 1. At the beginning of the rotation, the limiting pin 31 is still locked in the arc groove 111 by the L-shaped locking pin 51. Even if the drive ring protrusion 21 and the slider 42 are a certain distance apart along the Y direction, the slider 42 will not move upward. As the inner barrel 2 continues to rotate, the top of the L-shaped locking pin 51 will be inserted into the limiting groove 215. The L-shaped locking pin 51 will pass through the first arc groove 2151, the second arc groove 2152 and the third arc groove 2153 in sequence, and finally disengage from the limiting groove 215. As the L-shaped locking pin 51 passes through the second arc groove 2152, the distance from the second arc groove 2152 to the center line of the inner cylinder 2 gradually decreases from both ends to the middle position. The L-shaped locking pin 51 will move to the left along the X direction, unlocking the limiting pin 31. The bottom plate 3 will then flip downwards under the gravity of the slag. Driven by the connecting rod 41, the slider 42 will move upwards along the Y direction, eventually abutting against the drive ring protrusion 21. After the top of the L-shaped locking pin 51 disengages from the limiting groove 215, it will reset under the action of the first spring 54. When the second arc segment 213 is directly above the slider 42, the motor 61 stops working. During this process, the inner cylinder 2 rotates 180 degrees relative to the outer cylinder 1, so that the initial first arc segment 211 is above the slider 42, and the final second arc segment 213 is above the slider 42.

[0039] When loading slag again, motor 61 continues to operate, and the inner barrel 2 rotates relative to the outer barrel 1. During rotation, the first spiral segment 212 or the second spiral segment 214 drives the slider 42 to move downwards along the Y direction. Under the action of connecting rod 41, the bottom plate 3 flips upwards, causing the limiting pin 31 to re-engage, resulting in the L-shaped locking pin 51 locking the arc groove 111. Of course, the right end of the L-shaped locking pin 51 is provided with a guide slope to ensure that the limiting pin 31 can smoothly pass over the L-shaped locking pin 51 during the process of engaging the arc groove 111. During this process, the inner barrel 2 rotates 180 degrees relative to the outer barrel 1, so that the initial second arc segment 213 is above the slider 42, and the final first arc segment 211 is above the slider 42.

[0040] The present invention has the following technical effects:

[0041] By driving the inner barrel to rotate relative to the outer barrel through the drive mechanism, the bottom plate can be unlocked and automatically closed. The opening or closing of the bottom plate does not require manual intervention, making the operation simple, time-saving, and labor-saving, reducing labor costs, and helping to improve the excavation efficiency of the pile hole.

[0042] In addition, the inner barrel rotates during the unloading process, which reduces the amount of slag residue remaining on the inner wall of the barrel, allowing for more thorough unloading.

[0043] In addition, such as Figure 6 As shown, the inner barrel 2 is equipped with a floating structure, that is, the inner barrel 2 can float up and down relative to the outer barrel 1, and a second spring is provided between the first annular protrusion 12 and the third annular protrusion 22.

[0044] In this way, during the unloading process, as the bottom plate 3 flips downward under the gravity of the slag, the slider 42 will move upward quickly and impact the second arc segment 213 of the drive ring protrusion 21. Under the impact force, the inner barrel 2 will vibrate up and down relative to the outer barrel 1, so that the slag can be discharged quickly and further reduce the amount of slag remaining on the inner wall surface of the inner barrel 2 and the inner surface of the bottom plate 3, thus enabling more thorough unloading.

[0045] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bottom-discharge type bucket, characterized in that; The bottom-discharge bucket includes an outer bucket body (1), an inner bucket body (2), a bottom plate (3), a transmission mechanism (4), a locking mechanism (5), a drive mechanism (6), and a handle (7); the inner bucket body (2) is located inside the outer bucket body (1), and the inner bucket body (2) can rotate circumferentially relative to the outer bucket body (1). The bottom plate (3) is flipped and connected to the outer bucket body (1). The flipping of the bottom plate (3) relative to the outer bucket body (1) can open or close the opening at the bottom of the inner bucket body (2); the inner bucket body ( 2) The bottom plate (3) is connected to the outer barrel (1) via the transmission mechanism (4). The locking mechanism (5) is located on the outer barrel (1). The locking mechanism locks the bottom plate (3) in the closed state. During the rotation of the inner barrel (2) relative to the outer barrel (1), the inner barrel (2) can drive the bottom plate (3) to flip through the transmission mechanism (4), so that the bottom plate (3) switches between the closed state and the open state. The rotation of the inner barrel (2) can also trigger the locking mechanism (5) to unlock the bottom plate (3). The inner wall of the outer barrel (1) is provided with a first ring protrusion (12) and a second ring protrusion (13). The first ring protrusion (12) and the second ring protrusion (13) are spaced apart along the Y direction. The outer wall of the inner barrel (2) is provided with a third ring protrusion (22). A collar (23) is screwed to the top of the inner barrel (2) to facilitate the disassembly of the inner barrel. The collar (23) and the third ring protrusion (22) are spaced apart along the Y direction and located between the first ring protrusion (12) and the second ring protrusion (13) to achieve axial positioning of the inner barrel (2) and the outer barrel (1). The transmission mechanism (4) includes a connecting rod (41) and a slider (42). The two ends of the connecting rod (41) are hinged to the slider (42) and the base plate (3) respectively. The slider (42) is slidably disposed on the outer barrel (1) along the Y direction. The outer wall surface of the outer barrel (1) is provided with a driving ring protrusion (21). The driving ring protrusion (21) is used for the slider to abut against. The driving ring protrusion (21) is divided into four segments, namely the first arc segment (211), the first spiral segment (212), the second arc segment (213), and the second spiral segment (214) connected end to end. Along the Y direction, the first arc segment (211) is parallel to the second arc segment (213), and the first arc segment (211) is lower than the second arc segment (213).

2. The bottom-discharge bucket according to claim 1, characterized in that; The locking mechanism (5) includes an L-shaped locking pin (51), a guide rod (52), a nut (53), and a first spring (54). The guide rod (52) passes through the outer barrel (1) and is connected to the L-shaped locking pin (51). The L-shaped locking pin (51) can move in the X direction. The first spring (54) is sleeved on the guide rod (52), and the nut (53) is screwed onto the guide rod (52). An mounting plate (11) is provided on the outer barrel (1). The mounting plate (11) is provided with an arc groove (111), and a limit pin (31) is provided at the end of the bottom plate (3). When the bottom plate (3) is in the closed state, the limit pin (31) is locked in the arc groove (111). Under the action of the first spring (54), the L-shaped locking pin (51) restricts the limit pin (31) in the arc groove (111). At this time, the bottom plate (3) is locked and cannot be flipped down to open.

3. The bottom-discharge bucket according to claim 1, characterized in that; A limiting groove (215) is provided on the drive ring protrusion (21). The limiting groove (215) is used for the L-shaped locking pin (51) to be inserted. The limiting groove (215) includes a first arc groove (2151), a second arc groove (2152) and a third arc groove (2153) connected in sequence. The first arc groove (2151) is located on the lower surface of the first spiral segment (212), the second arc groove (2152) is located on the lower surface of the first arc segment (211), and the third arc groove (2153) is located on the lower surface of the second spiral segment (214). The first arc groove (2151) and the third arc groove (2153) are concentrically arranged with the inner barrel (2). The distance from the second arc groove (2152) to the center line of the inner barrel (2) gradually decreases from the two ends of the second arc groove (2152) to the middle position.

4. The bottom-discharge bucket according to claim 1, characterized in that; The drive mechanism (6) includes a motor (61) and a gear (62). The gear (62) is located on the output shaft of the motor (61). The gear (62) meshes with the tooth structure on the third annular protrusion (22). When the motor (61) drives the gear (62) to rotate, the inner barrel (2) will rotate relative to the outer barrel (1).

5. The bottom-discharge bucket according to claim 1, characterized in that; The handle (7) is rotatably mounted on the top of the outer barrel (1).

6. The bottom-discharge bucket according to claim 1, characterized in that; The inner barrel (2) is equipped with a floating structure, that is, the inner barrel (2) can float up and down relative to the outer barrel (1), and a second spring is set between the first annular protrusion (12) and the third annular protrusion (22).

7. A bottom-discharge bucket according to claim 1, characterized in that; The working method is as follows: When loading slag, the bottom plate (3) is in the closed state. At this time, the first arc segment (211) of the drive ring protrusion (21) abuts against the slider (42), and the L-shaped locking pin (51) restricts the limiting pin (31) in the arc groove (111) under the action of the first spring (54). When unloading slag, the motor (61) works, causing the inner barrel (2) to rotate relative to the outer barrel (1). At the beginning of the rotation, the limiting pin (31) is still locked in the arc groove (111) by the L-shaped locking pin (51). Even if the drive ring protrusion (21) and the slider (42) are a certain distance apart along the Y direction, the slider (42) will not move upward. As the inner barrel (2) continues to rotate, the top of the L-shaped locking pin (51) will be inserted into the limiting groove (215). The L-shaped locking pin (51) will pass through the first arc groove (2151), the second arc groove (2152), and the third arc groove (2153) in sequence. Finally, it leaves the limiting groove (215); as the L-shaped locking pin (51) passes through the second arc groove (2152), the distance from the second arc groove (2152) to the center line of the inner cylinder (2) gradually decreases from the two ends of the second arc groove (2152) to the middle position. The L-shaped locking pin (51) will move to the left along the X direction, so that the L-shaped locking pin (51) unlocks the limiting pin (31). The bottom plate (3) flips down under the gravity of the slag. Under the driving action of the connecting rod (41), the slider (42) will move up along the Y direction and finally abut against the drive ring protrusion (21). After the top of the L-shaped locking pin (51) disengages from the limiting groove (215), the L-shaped locking pin (51) will be reset under the action of the first spring (54); when the second arc segment (213) is directly above the slider (42), the motor (61) stops working; during this process, the inner barrel (2) rotates 180 degrees relative to the outer barrel (1), so that the initial first arc segment (211) is above the slider (42), and the final second arc segment (213) is above the slider (42); When loading slag again, the motor (61) continues to work, and the inner barrel (2) rotates relative to the outer barrel (1). During the rotation, the first spiral segment (212) or the second spiral segment (214) will drive the slider (42) to move downward along the Y direction. Under the action of the connecting rod (41), the bottom plate (3) will flip upward, so that the limiting pin (31) will be locked again, causing the arc groove (111) to be locked by the L-shaped locking pin (51). Of course, the right end of the L-shaped locking pin (51) is provided with a guide slope to ensure that the limiting pin (31) can smoothly pass the L-shaped locking pin (51) during the process of being locked into the arc groove (111). During this process, the inner barrel (2) rotates 180 degrees relative to the outer barrel (1), so that the initial second arc segment (213) is above the slider (42), and the final first arc segment (211) is above the slider (42).

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